5..25V

+5V

iC-OV

THERMAL

SHUTDOWN

LOW VOLTAGE

BIAS

ERROR

TRACK1

TRACK2

2

2

1

1

TRACK3

TRACK4

TRACK5

LED-CURRENT CONTROL

DREF

DDC

MONITOR

(see TRACK2)

(see TRACK2)

(see TRACK2)

1

c2

TEST

1

c2

100nF

CB

RSET

14k

LED

RNER

10k

RLED

47

VCC

GND

LED

C5

C4

C3

C2

C1

NER

NINV

TREF

AGND

ISET

8

1

7

6

5

4

3

13

2

10

9

14

11

12

TNRF

BLCC OVC3

IS

Vref

1.0

0.5

iC-OV

5-BIT OPTO ENCODER

FEATURES

APPLICATIONS

° High synchronism and technical reliability due to monolithic

construction plus integrated photodiodes

° Short track pitch (600 µm)

° Scanning with constant-light evaluation

° Photoelectric amplifier with high cut-off frequency

° Current comparators with hysteresis

° Current-limited TTL-compatible push-pull outputs

° Adjustable LED current control for constant receive power

° Integrated 40mA driver for the LED

° Integrated test aid

° Output of track 1 can be inverted to change the counting

direction during Gray Code scanning

° Overtemperature circuit-breaker with hysteresis

° Detection and fault message when the safe operating range

is exceeded, as the result of undervoltage, over-temperature

or an LED current outside the control range

° Low power consumption

° Scanning with constant-light

evaluation in absolute and

multiturn rotary encoders

CHIP

3.6mm × 2.9mm

BLOCK DIAGRAM

© 2000

Rev C0

iC-Haus GmbH

Tel

+49-6135-9292-0

Integrated Circuits

Fax +49-6135-9292-192

Am Kuemmerling 18, D-55294 Bodenheim

http://www.ichaus.com